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Quantum Filtering One Bit at a Time

Ralph, JF; Oxtoby, NP; (2011) Quantum Filtering One Bit at a Time. Physical Review Letters , 107 (26) , Article 260503. 10.1103/PhysRevLett.107.260503. Green open access


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In this Letter we consider the purification of a quantum state using the information obtained from a continuous measurement record, where the classical measurement record is digitized to a single bit per measurement after the measurements have been made. Analysis indicates that efficient and reliable state purification is achievable for one- and two-qubit systems. We also consider quantum feedback control based on the discrete one-bit measurement sequences.

Type: Article
Title: Quantum Filtering One Bit at a Time
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.107.260503
Publisher version: http://link.aps.org/doi/10.1103/PhysRevLett.107.26...
Language: English
Additional information: © 2011 American Physical Society date-added: 2012-10-05 15:43:08 +0100 date-modified: 2012-10-05 15:43:16 +0100 issue: 26 numpages: 5 bdsk-url-1: http://link.aps.org/doi/10.1103/PhysRevLett.107.260503 bdsk-url-2: http://dx.doi.org/10.1103/PhysRevLett.107.260503
URI: http://discovery.ucl.ac.uk/id/eprint/1366182
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